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TJA1021AT/0Z TJA1021AT
Configuration
1 options
Configuration
24+
Available for RFQ
Technical data
Product details
14
specifications
Core information
- Product name
- NXP TJA1021AT / 0Z
- Type
- NXP
- Minimum package
- 2500 未知
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- NXP
- Electronic Component
- TJA1021AT/0Z
- Electronic Component
- 1
- Package
- SO-8
- Electronic Component
- Other Interface
- Electronic Component
- 0.186g
- Electronic Component
- 1
- Electronic Component
- BM0234453032
- Electronic Component
- Electronic Component
- Electronic Component
- 2500
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
TJA1021AT/0Z 产品概述
一、概述
TJA1021AT/0Z 为恩智浦（NXP）车规级 LIN 收发器，面向低速局域网络节点，支持 5.5 至 27 V 电源输入，工作波特率以 10.4 kbaud 为参考（满足 LIN 总线低速通信要求），工作温度范围 -40 °C 至 +150 °C。器件封装为 SO-8，适用于汽车车身电子、车门模块、照明控制、座椅/后视镜模块等典型 LIN 应用。
二、主要功能特性
- 中断生成（INT）：可向主控 MCU 报告错误或唤醒事件，便于快速进入处理流程。
- 故障安全（fail-safe）：集成短路保护、过温保护、总线失效容忍，保证在线路故障或断电时系统安全退化。
- 唤醒功能：通过 LIN 总线检测显性脉冲完成唤醒，支持从低功耗休眠到通信模式的自动切换。
- 宽电源范围：5.5–27 V，兼容汽车系统电源瞬态与不同供电条件。
- 封装与可靠性：SO-8 封装便于 PCB 布局与散热，满足汽车工作环境要求。
三、引脚与接口注意事项
- 标准引脚函数包含 TXD/RXD（与 MCU TTL/CMOS 接口）、INT、中断信号、Vb（总线电源）、GND 以及 LIN_Bus 引脚。
- 建议在 Vb 端使用低 ESR 电容做去耦，并在总线侧增加 TVS 与熔断保护元件以应对浪涌与反接。
- INT 信号建议连接至 MCU 的外部中断输入并配置合适的干扰滤波与上拉策略，避免误唤醒。
四、典型应用与电路要点
- 典型电路：MCU ↔ (TXD/RXD) ↔ TJA1021 ↔ LIN 总线；Vb 经熔断与去耦供电，总线侧并联上拉电阻或单独的 LIN 主节点上拉。
- 布局建议：LIN 总线走线尽量远离高速信号，GND 做整片平面并短接器件地脚，Vb 去耦尽量靠近封装引脚。
- EMC/ESD：在总线与 Vb 端添加合适的 TVS，器件本身有一定的容错设计，但外部防护仍必需以满足车规 EMC 要求。
五、设计与可靠性提示
- 温度边界：器件标注工作温度至 150 °C，实际应以数据手册的结温/封装热阻与系统散热条件为准进行热设计。
- 故障处理：利用 INT 报警配合软件策略可实现过流、短路及总线故障检测与隔离，提升系统鲁棒性。
- 选型与合规：建议参考最新数据手册确认绝对最大额定值、功耗、静态电流等关键参数，并验证是否满足目标系统的 AEC-Q 和 EMC 要求。
六、结论与选用建议
TJA1021AT/0Z 为面向汽车应用的成熟 LIN 收发器，适合需要宽电源容忍、强故障保护与唤醒/中断功能的节点设计。设计时重点关注 Vb 去耦、总线防护与 INT 信号的可靠接入，并在系统层面配合软件异常处理策略以发挥其故障安全优势。欲获得详细电气特性和应用电路，请以恩智浦最新数据手册为准。
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